Ping Spikes on IP 500v2 R8.0(42)

[PhoneMan777]

Has anyone seen this issue before? We are experiencing an issue where if we ping the IP Office then every minute like clockwork the IP Office will spike up for about 3 or 4 replys to usually less than 200ms, but apparently enough to make a noticeable sounds in the voice quality. I assume there must be a service that is running on the IP Office? Any ideas?

 

[hairlessupportmonkey]

Ive seen iffy VCM cards do just this.

ACSS - SME
General Geek

 

[DanACS]

Have you tried with your laptop direct in the IPO withe the network unplugged to prove it is the IPO? I've seen network scanning software cause things like that.

ACSS - SME
APSS - SME
APDS - Unified Communications
ACS - IP Telephony
ACA - IP Telephony

 

[PhoneMan777]

Dan,
I have not tried to ping directly to the system. We have over 300 IP Phones connected to the system currently. I am wondering if the RTP Monitor could be spiking the NIC. I see a lot of H323 traffic information in monitor when it happens.

Hairlessupportmonkey,
Is there anyway to test the VCM that you know of shy of replacing it? Thery do not show any alarms in SSA.

 

[intrigrant]

In sys monitor you can, look for resends and stuff like that.
Bad IP routes in IP Office can do exactly that what you experience, example:
IP Office LAN 1 = 192.168.42.1 and there is a IP route 192.168.42.0/255.255.255.0/192.168.42.254/LAN1 then you get these kind of errors.
I have telecom engineers seeing do that and then blame the IPO to be crappy stuff......
If the customer has a LAN 192.168.0.0/255.255.0.0 then remove the route pointing to dialin or change it to a complete different subnet like 10.137.100.0

If it ain't dutch it ain't much

 

[PhoneMan777]

Intrigrant, I only have a defualt route 0.0.0.0 0.0.0.0 10.x.x.x created. There are no duplicate routes. I do see tons of H323 information traffic burst in monitor at the time of the spikes.

 

[hairlessupportmonkey]

bear in mind that ICMP traffic normally has the lowest priority on a network. perhaps its a bit of a red herring?

ACSS - SME
General Geek